摘要
目的探讨中枢神经细胞瘤的影像学表现。方法回顾性分析17例中枢神经细胞瘤患者的影像学资料。结果侧脑室内12例,中脑2例,额叶1例,顶叶1例,松果体1例。侧脑室内12例病灶均邻近透明隔或Monro孔处,与透明隔或侧脑室壁相连;CT上呈等、稍高密度,均伴囊变坏死,3例伴钙化灶;MRI上实质呈等或稍长T1稍长T2信号,均伴坏死囊变,且多位于病灶周缘,8例边缘伴条索样结构与脑室壁、透明隔粘连;增强后病灶实质多呈轻度至中度强化,其中8例见坏死区明显环状强化或T1WI略低信号区斑片状明显强化,7例病灶内及边缘见流空或强化血管影;12例均伴患侧脑室积水扩大,仅3例伴间质水肿。5例脑室外病灶中,3例为实性或偏实性肿瘤,实质呈等及稍长T1、T2混杂信号,2例伴囊变坏死、出血及周围水肿,不均匀明显强化,1例呈轻度均匀强化;另2例偏囊性,呈长T1长T2信号,周伴等信号环壁,其中1例伴等信号分隔及周围水肿,增强后均明显环形强化。结论侧脑室内CNC影像学表现有一定的特征性,综合分析CT及MRI表现并结合临床,应首先考虑CNC,而侧脑室外CNC缺乏特征性,最后确诊依赖病理。
Objective To investigate the imaging appearances of the central neurocytoma. Methods 17 cases which proved by pathology were retrospectively analyzed with imaging appearance. Results 12 lesions located in the lateral ventricle, 2 in midbrain,1 in frontal lobe, 1 in parietal lobe and 1 in pineal body.12 lesions located in the lateral ventricle all adjacent to Monro hole and septum pellucidum,The lesions presented as iso-density or slightly high density on CT with necrotic area and calcifications;with irrugular shape, present as hypo-intense and equal signal intensity on T1 WI and inhomoge-neous hyperintense signal on T2 WI,all lesions were associated with multiple cystic degen-eration in tumors, as well as there were multiple strip-like structures in the periphery, which adhered to the ventricle walls and callus in 8 patients.On post-contrast MR scan, the solid part of 8 lesions demonstrated moderate or obvious enhancement, the thick enhanced vessels were found in 7 patients;lateral ventricle widened in 12 cases, only 3 cases with interstitial edema. 5 cases out of lateral ventricle in MRI scans showed mix signal,without above characteristic appearances. Conclusion Conclusion The imaging of CNC in the lateral ventricle has some characteristics, aggregate analysis CT,MRI and associated with patients history should be first considered CNC, CNC outside the lateral ventricle lack of specificity, and the final diagnosis still depends on pathology.
出处
《中国CT和MRI杂志》
2015年第8期10-13,共4页
Chinese Journal of CT and MRI
